Humans, birds and fish can all be affected by PSP toxins. Herbivorous zooplankton is the primary transvector which can in turn transmit the toxin to fish and possibly other marine creatures which consume zooplankton (Baden 1983). The usual route for humans is the consumption of raw or cooked contaminated shellfish.
The definition of obstinate is extremely stubborn and determined to have your own way. An example of obstinate is a person who drives during a severe hurricane despite major warnings not to do so. obstinate. not easily subdued, ended, etc. obstinate.
ACROSTIC: A poem in which the first or last letters of each line vertically form a word, phrase, or sentence. Apart from puzzles in newspapers and magazines, the most common modern versions involve the first letters of each line forming a single word when read downwards.